Using the periodic table, complete the table to describe each atom. type in your answers. a ? b? c? d? e? f?

First row:

Second row:

The atomic number of an atom is the same as its number of protons. There are 20 protons in the atom in the first row. Its atomic number will be 20.

The mass number of an atom is the sum of its number of protons and its number of neutrons.

Elements on an periodic table are arranged by their atomic number. What's the symbol of the element with atomic number 20? What's the symbol of the element with atomic number 9? The element with atomic number nine is fluorine. The symbol for fluorine is "F", which happens to be the label for that blank.

law of conservation of matter

1. they vary with a higher number because boiling is way hotter than melting